Home / 20,578.28-28,396.55-12,080.75

Finding the Fourth Proportional to 20,578.28, 28,396.55 and 12,080.75

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Solution

The fourth proportional to 20,578.28, 28,396.55 and 12,080.75 is: 16,670.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,578.28 : 28,396.55 = 12,080.75 : x
  2. Step 2: Convert to fraction form
    20,578.28/28,396.55 = 12,080.75/x
  3. Step 3: Cross multiply
    20,578.28x = 28,396.55 × 12,080.75
  4. Step 4: Simplify right side
    20,578.28x = 343,051,621.41
  5. Step 5: Solve for x
    x = 343,051,621.41/20,578.28
  6. Step 6: Final answer
    x = 16,670.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.